motor housing, and upper blade guard. A number of these parts were rendered

+

in Inventor in order to create a three dimensional model of their assembly. Another analysis section followed, this time however for the engineering aspects

+

of the product. This included an introduction, problem statement, diagram of the process, the

+

governing equations, example calculations a solution check to verify the results and lastly for that

+

part a discussion on the analysis. Gate 3 closed out with three design revisions, consisting of the

+

handle, torx screws and exhaust cover.

+

+

Gate 4 involved the reassembly of the circular saw. A final cause for corrective action was

+

done to sum up the final efforts of the project. The product archaeology section contains a product

+

assembly guide in chart form. Within this is a difficulty scale to assess the difficulty of

+

each individual part. The initial disassembly and final reassembly were also compared to

+

evaluate the inherent changes between them. The assembly challenges were also documented.

+

The primary mechanism of the circular saw, the motor, was explained in depth. Its purpose,

+

design and function was all explained along with various equations for use during its design

+

and manufacture. Gate 4 concluded with three potential design revisions for this circular saw.

+

The revisions include a handle extension for easier maneuverability, a dust collection system to

+

reduce debris while cutting and a rolling pin wheel structure to increase the safety and precision

+

capable of the product.

+

+

The final task, Gate 5 included the finalization and revision of all previous gates. It also included

+

an in class oral deliverable presenting one of our design revisions from gate 4. We chose to

+

showcase the roller pin system.

:[[File:Skilsaw15.jpeg]]

:[[File:Skilsaw15.jpeg]]

Line 7:

Line 59:

== Project Overview ==

== Project Overview ==

+

+

Over the course of the semester, group 15 dissected, reassembled, and analyzed a Skil 7 1/4" Circular Saw. Throughout this process, the design, functionality, and other aspects that went into the engineering of the product were observed in order to arrive at conclusions about it at a component and system level.

Latest revision as of 07:21, 9 December 2012

Contents

Executive Summary

This report will analyze and discuss the reverse engineering process of our chosen product, the Skil 7 ¼
in. circular saw. The following report is divided into four main sections. Respectively the four gates are
Project Planning, Product Dissection, Product Analysis, and Product Explanation. A fifth gate also exists,
which is the delivery of the assignment.

For Gate 1 the foundation for the rest of the project was laid. Over the course of this gate a work
proposal was created to help deal with the management of the group. We analyzed in depth the
disassembly process to help avoid any potential caveats that might arise during the process. To
further assist with project management each group member was evaluated on their strengths and
weaknesses. In coordination with this evaluation each group member was assigned a specific
role that they would retain for the duration of the project. A plan to divide the work evenly and
efficiently to the most capable group members for the designated task was also formulated.
Finally various profiles were developed, which include usage, energy, complexity, user, and
product alternative. These were essential in understanding the functions, interactions, and
reasons for the design of the current product. This would be vital for later stages in the project.

Gate 2 started off a cause for corrective action section to help remedy any problems remaining
within the group. The actual dissection of all major product components also occurred during
this gate. This was to achieve an in depth understanding of the various subsystems, both inner
and outer involved in the circular saw. The actual dissection process was documented, and all
of the parts were cataloged. Each dissection step was given a difficulty rating as well. After
the dissection the subsystems were analyzed in depth. The various connections between the
individual subsystems along with their specific arrangement were taken into account during this
analysis.

Gate 3 began the process of looking at the individual components more in depth. First off
another cause for corrective action summary was documented to track the progress of the
group. After that the product evaluation for the components was documented. This included an
introductory summary and followed up with the actual product analysis. The analysis consisted
of a complexity scale and a component analysis for eight major components of the circular saw.
Namely the carbon brushes, saw blade, trigger, central power cable, handle, lower blade guard,
motor housing, and upper blade guard. A number of these parts were rendered
in Inventor in order to create a three dimensional model of their assembly. Another analysis section followed, this time however for the engineering aspects
of the product. This included an introduction, problem statement, diagram of the process, the
governing equations, example calculations a solution check to verify the results and lastly for that
part a discussion on the analysis. Gate 3 closed out with three design revisions, consisting of the
handle, torx screws and exhaust cover.

Gate 4 involved the reassembly of the circular saw. A final cause for corrective action was
done to sum up the final efforts of the project. The product archaeology section contains a product
assembly guide in chart form. Within this is a difficulty scale to assess the difficulty of
each individual part. The initial disassembly and final reassembly were also compared to
evaluate the inherent changes between them. The assembly challenges were also documented.
The primary mechanism of the circular saw, the motor, was explained in depth. Its purpose,
design and function was all explained along with various equations for use during its design
and manufacture. Gate 4 concluded with three potential design revisions for this circular saw.
The revisions include a handle extension for easier maneuverability, a dust collection system to
reduce debris while cutting and a rolling pin wheel structure to increase the safety and precision
capable of the product.

The final task, Gate 5 included the finalization and revision of all previous gates. It also included
an in class oral deliverable presenting one of our design revisions from gate 4. We chose to
showcase the roller pin system.

Figure 1. Skil 7 1/4" Circular Saw

Project Overview

Over the course of the semester, group 15 dissected, reassembled, and analyzed a Skil 7 1/4" Circular Saw. Throughout this process, the design, functionality, and other aspects that went into the engineering of the product were observed in order to arrive at conclusions about it at a component and system level.